Pig Diet Guide: What to Feed Pet Pigs for Long-Term Health

By Dr Duncan Houston

Quick Answer

Pet pigs should be fed a balanced commercial mini pig diet with controlled portions to prevent obesity. Fresh vegetables can be added in moderation, but high-calorie feeds, excessive treats, and livestock pig diets should be avoided. Keeping pigs lean is critical for their long-term health.

Feeding pigs sounds simple… until it isn’t.

Most pet pigs are overfed, under-exercised, and slowly heading toward obesity without owners realising it.

The tricky part is pigs are always hungry. They will convince you they are starving five minutes after eating.

They are not.

What to do when feeding your pig

If you want to get this right from day one:

1. Feed a proper mini pig diet

2. Control portion size carefully

3. Limit treats strictly

4. Monitor weight regularly

5. Adjust based on body condition, not appetite

If you follow those five things, you avoid most problems.

What should pigs actually eat

The foundation of a healthy diet is:

• commercial mini pig pellets

These are designed to:

• provide balanced nutrition

• control calorie intake

• support healthy growth and maintenance

Avoid using:

• livestock pig feed

• grower or finisher diets

These are designed for rapid weight gain, not long-term health.

Vegetables and extras

Vegetables are a good addition, but not the main diet.

Good options:

• leafy greens

• zucchini

• cucumber

• capsicum

• small amounts of carrot

These add:

• fibre

• enrichment

• variety

But they should not replace a balanced base diet.

Foods to avoid

Some foods cause problems quickly:

• high-sugar treats

• processed human foods

• excessive fruit

• bread and grains

• fatty scraps

These lead to:

• rapid weight gain

• metabolic issues

• long-term health problems

Why obesity is such a big problem in pigs

This is the number one issue I see.

Overweight pigs develop:

• joint problems

• mobility issues

• fat deposits around organs

• reduced lifespan

In severe cases, obesity can even affect vision and overall quality of life.

Keeping pigs lean is not optional. It is essential.

How to know if your pig is overweight

This is where many owners struggle.

A healthy pig should:

• have a visible waist

• not have large fat pads over the eyes

• move easily without effort

If your pig looks round from every angle, they are likely overweight.

How often to feed

Most adult pigs should be fed:

• 2 measured meals per day

Avoid:

• free feeding

• constant access to food

Pigs will eat as much as you give them.

Treats and training

Pigs are highly food motivated, which makes training easier… and overfeeding easier.

Better treat options:

• small vegetable pieces

• low-calorie rewards

• using part of their daily ration

The goal is to reward without adding excess calories.

Water and hydration

Fresh water should always be available.

Pigs also benefit from:

• access to water for cooling

• mud or shaded areas in hot weather

Hydration plays a big role in overall health.

Feeding for different life stages

Piglets

• higher energy needs

• more frequent feeding

Adults

• strict calorie control

• maintenance diet

Older pigs

• monitor weight closely

• adjust diet as activity decreases

Common feeding mistakes

The most common issues I see:

• feeding too much

• using the wrong type of feed

• giving too many treats

• assuming pigs “need more food” because they act hungry

Pigs are excellent at convincing owners to overfeed them.

Exercise and diet go together

Diet alone is not enough.

Pigs need:

• space to move

• enrichment

• opportunities to explore

This helps:

• control weight

• improve behaviour

• support overall health

FAQ

Can pigs eat fruit

Yes, but only in small amounts. It is high in sugar.

Can pigs eat dog food

No. It is not nutritionally appropriate for pigs.

How much should I feed my pig

This depends on weight and diet. Portion control is key.

Why is my pig always hungry

Pigs are naturally food-driven. Hunger behaviour does not always mean they need more food.

Final thoughts

Feeding pigs properly is less about what they want and more about what they need.

They will always ask for more.

Your job is to say no when needed.

A lean pig is a healthy pig, and getting the diet right early makes everything easier long term.

Still unsure what to do next?

Pig diets can be confusing, especially when advice online is all over the place.

Are you feeding too much?
Is your pig overweight?
Are you using the right food?

If you’re unsure, getting guidance early can help you avoid the most common mistakes.

The ASK A VET™ app gives you access to veterinary advice when you need it, helping you manage your pig’s health with confidence.